I don't know. There is a lot of potential for misuse of such a system. There are quite a few people who consider those who have more questions than they do answers to be a drain on the site. Some consider people who got a lot of rep from editing to not have truly earned it.
The last thing we want is to make it easier for people to denigrate others in this way. We should not care how someone got their rep; they got it. It's theirs. If certain avenues of reputation are "worse" than others, then the correct solution is to either reduce or remove the rep gained from them. Otherwise, you shouldn't care. And if you do, that's something that should be fixed.
Rep should be source-neutral.
And we don't want to have another "accept rating" stat (a stat so abused, it's an informal rule that you can't even talk about it in comments). We want stats that foster competition and achievement, not division.
Plus, profile pages have enough stuff on them; they don't really need another stat.